New changelog entries:
* QA upload.
* Bump debhelper compat level to 9 to be able to use multiarch paths and to
allow using dh-exec.
* Move pkg-config files to a multiarch location to fix cross builds.

New changelog entries:
* Rebuild for new libc to update versioned dependency; this comes from
the __abort_msg dependency, dpkg-shlibs needs overriding since this is
actually a weak link, but this rebuild fixes things for now.
Closes: #625257.